They pointed out that reducing EW by more than 25 % through cryogenic cooling of the electrode is possible. Srivastava and Pandey [7] evaluated the cooling effect on copper electrode during EDM of M2 grade high-speed steel workpiece. They found that the EWR reduced by up to 20 % by using this method. Srivastava and Pandey [8] also investigated the effect of process parameters in the EDM process with ultrasonic-assisted cryogenically cooled electrode (UACEDM). The investigation showed that compared with the conventional EDM process, EWR and surface roughness (SR)were significantly lower in the UACEDM process,while the material removal rate (MRR) was at par with that of the conventional EDM but dropped to approximately 70 % only with cryogenic cooling of the electrodes(CEDM).Vinothand Pradeep[9]investigatedtheeffectofmachiningparametersof CEDM on machining performance. Results indicated that the surface morphology of the workpiece machined via CEDM was better than that of the workpiece machined via EDM. Aside from introducing cryogenic fluid (liquid nitrogen) into the tool electrode as coolant and evaluating the performanceofdifferentprocess parametersandUACEDM,specific research should be conducted to obtain a suitable temperature value below zero that might reduce the EWR without affecting MRR.